I have both. My production cues are all from the 60’s to the late 80’s. My only customs at the moment are some custom sneakys, an old Bert Schrager and my Sowder conversion.
Having bought and sold numerous cues over the last 15 years, what I have come to realize is old production cues do not play like new production cues. The quality of wood from even 30 years ago is difficult to find now. Custom cue makers worth their salt will cull their wood in order to find the right shaft wood, they will work with your desired shaft taper, and they will allow you to choose woods, design and inlays, all for a price.
A fancy custom is not inherently better than a plain Jane Lucasi, much as a Geo Metro is not inherently better than a Porsche 911, if the goal is to go from point A to point B.
A fair amount of pool is the mental game. Having a pool cue that looks and feels the way you want can have a big impact on your mental game.